I downloaded it from this site-payware though.
The fuel capacity is lower than the actual A380 and the fuel burn rate is higher than the actual A380. Therefore it doesn't fly very far as the actual one. I estimated it flew 4,000nm to 5,000nm. You can change all of this in the aircraft.cfg. Change the fuel capacity in the fuel section of the notepad and change the fuel flow scalar in the general engine data. You should have the same stats as the real one.
If you don't want to pay for it, there are many Airbus A380 downloads free at avsim.com.
Love the Airbus A380. It's huge!